Key Summary & High-Yield Concept Takeaways
Curated by senior faculty at Hodu Academy for fast revision, formula derivations, and standard board & competitive exam marking schemes.
- ✓Science (Class 6-10)
- ✓Physics (Class 11-12)
- ✓Chemistry (Class 11-12)
- ✓Biology (Class 11-12)
CBSE Important Formulas & Key Concepts (Class 6-12)
Maths, Science, Physics, Chemistry, Biology – Your Ultimate Cheat-Sheet by Hodu Academy
Get all essential CBSE formulas at your fingertips! This page brings you the most important formulas, definitions, and revision notes for Classes 6–12. Curated by the Hodu Academy team, perfect for quick board revision, NCERT, school tests, JEE/NEET, and Olympiad prep.
Bookmark this cheat-sheet for instant formula recall and scoring 90+ in CBSE.
Bookmark this cheat-sheet for instant formula recall and scoring 90+ in CBSE.
Table of Contents:
Science (Class 6-10)
Physics, Chemistry, Biology – Core Formulas & Concepts
Revision notes for CBSE 6-10: motion, force, simple machines, chemical equations, biology facts, and periodic trends. Download complete PDF below.
| Formula / Law | Definition / Note |
|---|---|
| Density = Mass / Volume | Physical property. Units: kg/m³ |
| Force = Mass × Acceleration | Newton's Second Law (F = m×a) |
| Speed = Distance / Time | Unit: m/s |
| Law of Conservation of Mass | Mass is neither created nor destroyed in a chemical reaction. |
Maths (Class 6-10)
Algebra, Geometry, Arithmetic, Trigonometry Basics
All essential CBSE Maths formulas for board scoring and fast problem solving.
| Formula | Definition / Note |
|---|---|
| Area of Rectangle = Length × Breadth | Basic area of a rectangle. |
| Roots of ax²+bx+c=0: x = [-b ± √(b²-4ac)]/2a | Quadratic Equation solution. |
| Mean = Sum of all values / Number of values | Arithmetic mean (average). |
| Perimeter of Circle = 2πr | r = radius. |
Physics (Class 11-12)
Equations of Motion, Optics, Electricity & More
Revision for CBSE Physics: all major formulas, constants and definitions. Download the full chapterwise PDF.
| Formula | Definition / Note |
|---|---|
| v = u + at | Final velocity (motion equations). |
| V = IR (Ohm’s Law) | V = voltage, I = current, R = resistance. |
| 1/f = 1/v – 1/u (Lens Formula) | f = focal length, v = image, u = object. |
| Work = Force × Displacement | Unit: Joule (J). |
Chemistry (Class 11-12)
Atomic Structure, Thermodynamics, Organic, Inorganic & More
Most important chemistry formulas for CBSE boards, NEET, and JEE. Organic, physical, and inorganic chapters included.
| Formula | Definition / Note |
|---|---|
| Molarity (M) = Moles of solute / Volume (L) | Unit: mol/L (concentration). |
| PV = nRT (Ideal Gas Law) | P = pressure, V = volume, n = moles, R = gas constant, T = temp (K). |
| pH = -log₁₀[H⁺] | Acidity/basicity of a solution. |
| Empirical Formula: simplest ratio of elements | E.g., CH₂O for glucose (C₆H₁₂O₆). |
Maths (Class 11-12)
Calculus, Algebra, Trigonometry, Coordinate Geometry, Statistics
All must-know Maths formulas for boards, IIT-JEE, and Olympiad level. Step-by-step solutions in the full download.
| Formula | Definition / Note |
|---|---|
| Slope (m) = (y₂–y₁)/(x₂–x₁) | Line joining two points. |
| Area under y=f(x) from a to b = ∫ₐᵇ f(x) dx | Definite integral. |
| nPr = n!/(n–r)! | Permutations formula. |
| a²–b² = (a–b)(a+b) | Algebraic identity. |
Biology (Class 11-12)
Genetics, Photosynthesis, Respiration, Human Physiology, Ecology & More
Board-ready Biology formulas, key laws, diagrams, and definitions. NCERT, NEET, and Olympiad friendly. Download chapterwise PDF below.
| Key Concept / Formula | Definition / Note |
|---|---|
| Law of Segregation (Mendel) | Each organism carries two alleles for each trait, which separate during gamete formation. |
| Photosynthesis: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ | Glucose formation using sunlight and chlorophyll. |
| ATP (Adenosine Triphosphate) | Universal energy currency of the cell. |
| DNA: Double Helix Structure | Watson & Crick’s model (1953). |
Want Important IGCSE Formulas?
Download IGCSE formula sheets for all subjects – direct from Hodu Academy:
© 2025 Hodu Academy | All rights reserved